Figure 1. Histopathological grading system used for evaluation of lymph node biopsies.

 Panels A - D show tissue sections stained with hematoxylin/eosin that respectively exemplify lymphocyte depletion scores of 1: less than 10% depletion; score 2: 10% to 50% depletion; score 3: 50% to 75% depletion; and score 4: greater than 75% depletion. Arrowheads indicate infiltrating histiocytes and fibrosis. 

© 2001, 2002 Institute for Viral Pathogenesis. All rights reserved.